A binaphtolate titanium complex featuring a linear tetradentate [OSSO]-bis(phenolato) ligand : Synthesis and partial hydrolysis to a homochiral dinuclear complex

Abstract Reaction of [{(R)-C 20 H 12 O 2 }Ti(O i Pr) 2 ] with 1,4-dithiaalkanediyl-2,2′-bis(6- tert -butyl-4-methyl-phenol) affords the chiral-at-metal complex [{(R)-C 20 H 12 O 2 }Ti{(C 6 H 2 O- t Bu-6-Me-4) 2 S(CH 2 ) 2 S}] ( 1 ) in low diastereomeric excess. Complex 1 can be partially hydrolyzed to give a dinuclear species [μ-{(R)-C 20 H 12 O 2 }-μ-O-{(Λ)-Ti[(C 6 H 2 O- t Bu-6-Me-4) 2 S(CH 2 ) 2 S]} 2 ] ( 2 ), in which the two titanium centers are homochiral. The molecular structure of 1 and 2 was confirmed by single crystal X-ray analysis, which shows C 2 -symmetry in both complexes.